Cofferdam structure of hydraulic reclamation mud field in mud flat area

Abstract

The utility model discloses a mud flat area hydraulic reclamation mud field cofferdam structure which comprises a Larsen steel plate assembly, one end of the Larsen steel plate assembly is fixedly provided with two cloth and one membrane anti-seepage assemblies through bolts, and one end of each cloth and one membrane anti-seepage assembly is provided with an impact buffering assembly. The Larsen steel plate assembly is used for replacing a traditional earth and stone causeway, the effective volume of a mud containing field is increased, the mud containing amount is increased, the occupied area is reduced, the limitation of earthwork sources is small, most of the mud containing field is subjected to mechanical construction, the construction speed is greatly increased, the construction period is shortened, and the device can be suitable for most construction areas with poor geology; when water flow impact is carried out on the inner side of the Larsen steel plate assembly, the inner side of the Larsen steel plate assembly is firstly impacted to the lower large-cambered-surface buffer groove for buffering from the inclined-surface buffer plate and then impacted to the upper small-cambered-surface buffer groove to be reversely impacted back to the inner side, so that the impact on the inner side of the steel plate pile can be effectively reduced, and a good buffer effect is achieved; the situation that the Larsen steel plate assembly inclines outwards due to the fact that the inner side is impacted by water flow is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic engineering, and specifically relates to a cofferdam structure for a tidal flat area hydraulic fill and silt receiving site. BACKGROUND

[0002] The tidal flat area hydraulic fill and silt receiving site is a site for hydraulic fill operation in a tidal flat area, and is mainly used for receiving and processing silt and sludge extracted from a river channel, a sea channel or other water sources in a dredging and desilting project. In the operation process of the tidal flat area hydraulic fill and silt receiving site, a dredger usually extracts silt from a riverbed or seabed, and then transports the silt to the tidal flat area through a pipeline, so that the silt is deposited and gradually forms new land. This process not only increases the available land area, but also improves the ecological environment of the surrounding area, for example, provides a habitat for wetland organisms.

[0003] The construction of the tidal flat area hydraulic fill and silt receiving site usually selects a soil and rock cofferdam as the cofferdam body of the silt receiving site. The cofferdam has a height of six meters, a top width of four meters, and an internal and external slope ratio of 1:2.5. According to the calculation, 84 cubic meters of embankment soil are required per meter of extension. The soil requirement is large, the construction process is complex, and the quality is difficult to control. A large number of personnel and machinery are required, and the management pressure is large. The construction efficiency is low, and safety accidents are prone to occur. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the problems of the construction of the existing tidal flat area hydraulic fill and silt receiving site, which usually selects a soil and rock cofferdam as the cofferdam body of the silt receiving site, has a large soil requirement, a complex construction process, and difficult quality control. A large number of personnel and machinery are required, and the management pressure is large. The construction efficiency is low, and safety accidents are prone to occur. The utility model provides a cofferdam structure for a tidal flat area hydraulic fill and silt receiving site.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a cofferdam structure for a tidal flat area hydraulic fill and silt receiving site, comprising: a Larsen steel plate assembly, one end of the Larsen steel plate assembly is provided with a two-cloth-one-film anti-seepage assembly through bolt fixing, one end of the two-cloth-one-film anti-seepage assembly is provided with an impact buffer assembly, and one end of the Larsen steel plate assembly above is provided with an anti-seepage piece fixing bolt penetratingly and fixedly arranged, and one end of the Larsen steel plate assembly below is provided with a buffer piece fixing bolt penetratingly and fixedly arranged.

[0006] As a further scheme of the utility model: the Larsen steel plate assembly comprises a Larsen steel sheet pile body, a steel sheet pile upper mounting through hole is formed in the inside of one end of the Larsen steel sheet pile body above, and a steel sheet pile lower mounting through hole is formed in the inside of one end of the Larsen steel sheet pile body below.

[0007] As a further scheme of the utility model: the two cloth one film anti-seepage assembly contains geotextile cloth one, waterproof and anti-seepage plastic film and geotextile cloth two, the waterproof and anti-seepage plastic film is located between geotextile cloth one and is arranged, the upper portion of the inside of geotextile cloth one is provided with geotextile cloth upper through-hole, the lower portion of the inside of geotextile cloth one is provided with geotextile cloth lower through-hole, the upper portion of the inside of waterproof and anti-seepage plastic film is provided with plastic film upper through-hole, the lower portion of the inside of waterproof and anti-seepage plastic film is provided with plastic film lower through-hole.

[0008] As a further scheme of the utility model: the impact buffering assembly contains L-shaped buffering seat, the upper portion of one end of L-shaped buffering seat is provided with upper small arc surface buffering groove, the lower portion of one end of L-shaped buffering seat is provided with lower large arc surface buffering groove, the one end of L-shaped buffering seat close to lower large arc surface buffering groove is fixedly provided with inclined surface buffering plate, the middle portion of one end of L-shaped buffering seat is through provided with mounting inner screw hole, and the mounting inner screw hole is screw-connected with adaptive buffering piece fixed bolt.

[0009] As a further scheme of the utility model: the number of Larsen steel plate assembly is provided with multiple groups and is mutually buckled, the upper mounting through-hole of steel sheet pile is adapted to anti-seepage piece fixed bolt, and the lower mounting through-hole of steel sheet pile is adapted to buffering piece fixed bolt.

[0010] As a further scheme of the utility model: the geotextile cloth two is same with geotextile cloth one in specification and model, and the inside is also provided with geotextile cloth upper through-hole and geotextile cloth lower through-hole structure, the geotextile cloth upper through-hole and plastic film upper through-hole are adapted to anti-seepage piece fixed bolt, and the geotextile cloth lower through-hole and plastic film lower through-hole are adapted to buffering piece fixed bolt.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1、the utility model discloses a Larsen steel plate assembly is used instead of traditional earth and stone dike, increases the effective volume of the mud receiving field, improves the mud receiving capacity, reduces the land area, and is little limited by earthwork source, most of which are mechanical construction, which greatly improves the construction speed, saves the construction period, can be applicable to most geological bad construction areas, and through the setting of impact buffering assembly, when water flow impacts the inside of Larsen steel plate assembly, it will first impact the lower large arc surface buffering groove through the inclined surface buffering plate, then impact the upper small arc surface buffering groove and reverse impact the inside, which can effectively reduce the impact of the inside of steel sheet pile and play a good buffering effect, preventing the inside from being impacted by water flow and causing the Larsen steel plate assembly to incline outward. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the outside overall structure schematic diagram of the utility model;

[0014] Figure 2 It is the inside structure schematic diagram of the utility model;

[0015] Figure 3 It is a structure schematic view of the larsen steel plate assembly in the utility model;

[0016] Figure 4 It is a structure schematic view of the two cloth one membrane anti-seepage assembly in the utility model;

[0017] Figure 5 It is a structure schematic view of the impact buffering assembly in the utility model.

[0018] In the drawing: 1, larsen steel plate assembly; 2, two cloth one membrane anti-seepage assembly; 3, impact buffering assembly; 4, anti-seepage piece fixing peg; 5, buffering piece fixing peg; 10, larsen steel plate pile body; 11, steel plate pile upper installation through-hole; 12, steel plate pile lower installation through-hole; 20, geofiber cloth one; 21, waterproof anti-seepage plastic film; 22, geofiber cloth two; 23, geotextile cloth upper through-hole; 24, geotextile cloth lower through-hole; 25, plastic film upper through-hole; 26, plastic film lower through-hole; 30, L-shaped buffering seat; 31, upper small arc surface buffering groove; 32, lower large arc surface buffering groove; 33, inclined surface buffering plate; 34, installation inner screw hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, it is necessary to explain that, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The embodiments of the utility model are described below according to the overall structure.

[0021] Referring to Figure 1 and Figure 2 In the utility model embodiment, a cofferdam structure of a tidal zone hydraulic fill and mud receiving field, comprising: a Larsen steel plate assembly 1, one end of the Larsen steel plate assembly 1 is provided with a two-cloth-one-film anti-seepage assembly 2 through bolt fixing, one end of the two-cloth-one-film anti-seepage assembly 2 is provided with an impact buffer assembly 3, one end of the Larsen steel plate assembly 1 is penetrated and fixed with an anti-seepage piece fixing bolt 4, and one end of the Larsen steel plate assembly 1 is penetrated and fixed with a buffer piece fixing bolt 5.

[0022] Referring to Figure 3 , the Larsen steel plate assembly 1 comprises a Larsen steel sheet pile body 10, a steel sheet pile upper mounting through hole 11 is formed in the inside of one end of the Larsen steel sheet pile body 10, a steel sheet pile lower mounting through hole 12 is formed in the inside of one end of the Larsen steel sheet pile body 10 below, a plurality of groups of the Larsen steel plate assembly 1 are arranged and are mutually buckled, the steel sheet pile upper mounting through hole 11 is matched with the anti-seepage piece fixing bolt 4, and the steel sheet pile lower mounting through hole 12 is matched with the buffer piece fixing bolt 5.

[0023] By using the above scheme: by selecting a suitable length of the Larsen steel plate assembly 1, the Larsen steel plate assembly 1 is sequentially inserted into the mud receiving field around the four corners and is embedded to form an external dike, and the two-cloth-one-film anti-seepage assembly 2 is fully laid on the inside of the Larsen steel plate assembly 1, so that the installation and fixation of the steel sheet pile dike can be completed.

[0024] Referring to Figure 4, the two cloth one film anti-seepage assembly 2 includes geotechnical fiber cloth one 20, waterproof anti-seepage plastic film 21 and geotechnical fiber cloth two 22, the waterproof anti-seepage plastic film 21 is located between the geotechnical fiber cloth one 20 and, the geotechnical fiber cloth one 20 is internally provided with geotextile upper through-hole 23 above, the geotechnical fiber cloth one 20 is internally provided with geotextile lower through-hole 24 below, the waterproof anti-seepage plastic film 21 is internally provided with plastic film upper through-hole 25 above, the waterproof anti-seepage plastic film 21 is internally provided with plastic film lower through-hole 26 below, the geotechnical fiber cloth two 22 is same with the geotechnical fiber cloth one 20 in specification and model, and the geotechnical fiber cloth two 22 is internally provided with geotextile upper through-hole 23 and geotextile lower through-hole 24 structure, the geotextile upper through-hole 23 and plastic film upper through-hole 25 are adapted to anti-seepage piece fixing bolt 4, and the geotextile lower through-hole 24 and plastic film lower through-hole 26 are adapted to buffer piece fixing bolt 5.

[0025] By the above scheme: install the anti-seepage piece fixing bolt 4 in the through hole 11, the geotextile upper through-hole 23 and the plastic film upper through-hole 25 on the steel sheet pile, the two cloth one film anti-seepage assembly 2 can be fixed and installed on the inside of the Larsen steel sheet assembly 1, and the length of the two cloth one film anti-seepage assembly 2 is same with the Larsen steel sheet assembly 1, so that the two cloth one film anti-seepage assembly 2 can not be moved and deformed due to external force when excavated soil is backfilled and compacted.

[0026] Refer to Figure 5 The impact buffer assembly 3 includes an L-shaped buffer seat 30, the L-shaped buffer seat 30 is provided with an upper small-arc buffer groove 31 above one end, the L-shaped buffer seat 30 is provided with a lower large-arc buffer groove 32 below one end, the L-shaped buffer seat 30 is fixedly provided with an inclined buffer plate 33 near one end of the lower large-arc buffer groove 32, and the L-shaped buffer seat 30 is provided with an installation inner screw hole 34 in the middle of one end.

[0027] By the above scheme: when water flow impacts the inside of the Larsen steel sheet assembly 1, the impact buffer assembly 3 is installed, and the water flow is first impacted to the lower large-arc buffer groove 32 by the inclined buffer plate 33, and then is impacted to the upper small-arc buffer groove 31 and is reversely impacted to the inside, so that the inside of the steel sheet pile can be effectively reduced and good buffering effect can be achieved.

[0028] The working principle of the utility model is: when using, first select the appropriate length number of Larsen steel sheet assembly 1, and then insert it into the four around mud field and embed each other to form the external dike, and fully lay the two cloth one film anti-seepage assembly 2 on the inside of the Larsen steel sheet assembly 1, and install the anti-seepage piece fixing bolt 4 in the through hole 11, the geotextile upper through-hole 23 and the plastic film upper through-hole 25 on the steel sheet pile to complete the installation, and the length of the two cloth one film anti-seepage assembly 2 is selected to be same with the length of the Larsen steel sheet assembly 1.

[0029] Secondly, the impact buffering assembly 3 of a proper specification is selected, placed on the inner side, and the inner threaded hole 34 is aligned with the lower geotextile through hole 24 and the lower plastic film through hole 26, the buffering piece fixing bolt 5 is penetrated into the lower steel sheet pile through hole 12, the lower geotextile through hole 24 and the lower plastic film through hole 26, and screwed into the inner threaded hole 34 until the installation of the impact buffering assembly 3 is completed;

[0030] Then, the excavation soil is backfilled and compacted at the bottom of the inner side of the Larsen steel sheet assembly 1, and the bottom height of the installed impact buffering assembly 3 needs to be ensured to be the same as the compacted height, so as to prevent the waterproof layer from being moved and deformed due to external force, the bottom of the outer side is provided with riprap, the problem of inconvenient construction of the beach silt ground is solved, the upper part is provided with four-to-six crushed stone soil rolling to be raised, and the outer side counter pressure is provided, so as to prevent the outer inclination of the pile body caused by excessive water pressure on the inner side.

[0031] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A cofferdam structure of a tidal flat reclamation site, characterized by, Include: Larssen steel plate assembly (1), one end of the Larssen steel plate assembly (1) is provided with two cloth and one membrane anti-seepage assembly (2) by bolt fixing, one end of the two cloth and one membrane anti-seepage assembly (2) is provided with impact buffer assembly (3), one end of the Larssen steel plate assembly (1) is penetrated and fixed with anti-seepage piece fixing bolt (4) above, one end of the Larssen steel plate assembly (1) is penetrated and fixed with buffer piece fixing bolt (5) below.

2. The cofferdam structure of a tidal flat area hydraulic fill clay deposit site according to claim 1, wherein, The Larssen steel plate assembly (1) comprises a Larssen steel sheet pile body (10), a steel sheet pile upper installation through hole (11) is formed in the upper end of the Larssen steel sheet pile body (10), a steel sheet pile lower installation through hole (12) is formed in the lower end of the Larssen steel sheet pile body (10).

3. The cofferdam structure of a tidal flat area hydraulic fill clay deposit site according to claim 1, wherein The two cloth and one membrane anti-seepage assembly (2) comprises a geotextile cloth one (20), a waterproof and anti-seepage plastic film (21) and a geotextile cloth two (22), the waterproof and anti-seepage plastic film (21) is arranged between the geotextile cloth one (20) and the geotextile cloth two (22), a geotextile cloth upper through hole (23) is formed in the upper part of the geotextile cloth one (20), a geotextile cloth lower through hole (24) is formed in the lower part of the geotextile cloth one (20), a plastic film upper through hole (25) is formed in the upper part of the waterproof and anti-seepage plastic film (21), a plastic film lower through hole (26) is formed in the lower part of the waterproof and anti-seepage plastic film (21).

4. The cofferdam structure of a tidal flat area hydraulic fill clay land according to claim 1, characterized in that, The impact buffer assembly (3) comprises an L-shaped buffer seat (30), an upper small arc surface buffer groove (31) is formed in the upper end of the L-shaped buffer seat (30), a lower large arc surface buffer groove (32) is formed in the lower end of the L-shaped buffer seat (30), an inclined surface buffer plate (33) is fixedly arranged at one end of the L-shaped buffer seat (30) close to the lower large arc surface buffer groove (32), an installation inner threaded hole (34) is formed in the middle of the one end of the L-shaped buffer seat (30), and the installation inner threaded hole (34) is screwed with the buffer piece fixing bolt (5).

5. The cofferdam structure of a tidal flat area hydraulic fill clay deposit field according to claim 2, characterized in that, A plurality of Larssen steel plate assemblies (1) are arranged and are mutually buckled, the steel sheet pile upper installation through hole (11) is matched with the anti-seepage piece fixing bolt (4), and the steel sheet pile lower installation through hole (12) is matched with the buffer piece fixing bolt (5).

6. The cofferdam structure of a tidal flat area hydraulic fill clay land according to claim 3, characterized in that, The geotextile cloth two (22) is the same as the geotextile cloth one (20) in specification and model, and the geotextile cloth upper through hole (23) and the geotextile cloth lower through hole (24) are also formed in the geotextile cloth two (22), the geotextile cloth upper through hole (23) and the plastic film upper through hole (25) are matched with the anti-seepage piece fixing bolt (4), and the geotextile cloth lower through hole (24) and the plastic film lower through hole (26) are matched with the buffer piece fixing bolt (5).

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